Bug 3721 – -debug flag doesn't behave as in spec

I'm not sure if this is a spec bug, a compiler bug, or both. debug static assert(0); dmd -debug gives error as expected dmd -debug=0 gives no error as expected dmd -debug=2 gives error NOT expected dmd -debug=me gives no error (as expected?) The spec says that -debug enables this. Actually, should the spec be saying anything about a compiler flag?? One argument is that debug with no condition should be enabled by any debug level no matter what. Then there's no need to mention a -debug flag in the spec. debug (0) static assert(0); dmd -debug=0 gives error as expected dmd -debug gives error NOT expected dmd -debug=me gives error NOT expected Again, it's debatable what should happen with -debug. But -debug=me should definitely not give an error here according to the spec.

*** This issue has been marked as a duplicate of issue 3321 ***